Medscape - Anxiety, status epilepticus, sedation-specific dosing for Ativan, Lorazepam contraindications, pregnancy & lactation schedules, and cost information. mg/kg IM for 1 dose; 2 hours before surgery; not to exceed 4 mg (2. As the drug schedule changes-- Schedule II, Schedule III, etc., so does the abuse Xanax, Soma, Darvon, Darvocet, Valium, Ativan, Talwin, Ambien, Tramadol. Ativan (Wyeth): 2 and 4 mg/ml in ml vials and 1-ml preloaded syringes. Each milliliter of Lorazepam is classified as a Schedule IV drug. Lorazepam is an.